Implement a `wisdomSimpleSlice` helper in `desktop/options.nix` to reduce
boilerplate for simple Home Manager modules that only manage packages.
This helper handles the `enable` option creation, platform-gating via
`availableOn`, and conditional inclusion in `home.packages`.
Refactor several existing wisdom modules to use this new helper:
- `wisdomBrowsersChrome`
- `wisdomBrowsersEdge`
- `wisdomEditorsKate`
- `wisdomEditorsObsidian`
Additionally, clean up `wisdom/default.nix` by removing the explicit
import of `wisdomShellBash` (which is now handled via auto-wiring) and
improving code formatting.
Olivier
103a485bf8